Which among the following gases do not contribute to green house effect ?

Options

A. Methane
B. Carbon dioxide
C. Water vapour
D. Nitrogen dioxide

Explanation

To determine which gas does not contribute to the greenhouse effect, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Greenhouse Effect**:
- The greenhouse effect is a natural process where certain gases in the Earth's atmosphere trap heat from the sun. This process helps to keep the Earth warm enough to sustain life.

**Hint**: Remember that the greenhouse effect is essential for maintaining the Earth's temperature.

2. **Identify Greenhouse Gases**:
- Common greenhouse gases include:
- Water vapor
- Carbon dioxide (CO2)
- Methane (CH4)
- Nitrous oxide (N2O)
- Ozone (O3)
- Chlorofluorocarbons (CFCs)

**Hint**: Make a list of gases that are known to contribute to the greenhouse effect.

3. **Analyze the Options**:
- We need to check which of the given gases is not a greenhouse gas. The options typically include gases like methane, carbon dioxide, water vapor, and nitrogen dioxide.

4. **Evaluate Each Gas**:
- **Methane**: Contributes to the greenhouse effect.
- **Carbon Dioxide**: Contributes to the greenhouse effect.
- **Water Vapor**: Contributes to the greenhouse effect.
- **Nitrogen Dioxide (NO2)**: This gas does not significantly contribute to the greenhouse effect.

**Hint**: Compare each gas against the list of known greenhouse gases.

5. **Conclusion**:
- Based on the analysis, nitrogen dioxide (NO2) is the gas that does not contribute to the greenhouse effect.

**Final Answer**: The gas that does not contribute to the greenhouse effect is **Nitrogen Dioxide (NO2)**.